/**
 * Naggy SEO / Use Case 落地页样式
 * 复用全局 token，保持与官网一致的克制卡片语言
 */

.seo-page {
  padding: 120px 0 80px;
  min-height: 70vh;
}

.seo-layout {
  max-width: 820px;
}

.seo-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  font-size: 13px;
  color: var(--text-tertiary);
  margin-bottom: 28px;
}

.seo-breadcrumb a {
  color: var(--text-secondary);
  text-decoration: none;
}

.seo-breadcrumb a:hover {
  color: var(--text-primary);
}

.seo-hero h1 {
  font-family: var(--font-serif);
  font-size: clamp(32px, 5vw, 44px);
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 12px 0 16px;
  color: var(--text-primary);
}

.seo-lead {
  font-size: 18px;
  line-height: 1.6;
  color: var(--text-secondary);
  margin-bottom: 20px;
}

.seo-meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 28px;
}

.seo-chip {
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  border-radius: var(--radius-full);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  font-size: 13px;
  color: var(--text-secondary);
}

.seo-chip-link {
  text-decoration: none;
  transition: background var(--transition-fast);
}

.seo-chip-link:hover {
  background: var(--bg-card-hover);
  color: var(--text-primary);
}

.seo-card,
.seo-cta-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px 28px;
  margin-bottom: 18px;
  box-shadow: var(--shadow-sm);
}

.seo-card h2,
.seo-cta-card h2,
.seo-related h2 {
  font-family: var(--font-serif);
  font-size: 22px;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.seo-card p,
.seo-cta-card p {
  color: var(--text-secondary);
  line-height: 1.7;
  font-size: 16px;
}

.seo-cta-card {
  background: linear-gradient(180deg, var(--bg-card) 0%, var(--bg-card-secondary) 100%);
  text-align: center;
}

.seo-cta-card .btn {
  margin-top: 16px;
}

.seo-faq-item + .seo-faq-item {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--border-subtle);
}

.seo-faq-item h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.seo-faq-item p {
  font-size: 15px;
}

.seo-related {
  margin-top: 36px;
}

.seo-related-grid,
.seo-index-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 14px;
  margin-top: 16px;
}

.seo-related-card,
.seo-index-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 18px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  text-decoration: none;
  color: inherit;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.seo-related-card:hover,
.seo-index-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.seo-related-card strong,
.seo-index-card strong {
  color: var(--text-primary);
  font-size: 16px;
}

.seo-related-card span,
.seo-index-card p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.5;
}

.seo-index-cat {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-tertiary);
  font-weight: 600;
}

.seo-more {
  margin-top: 16px;
  font-size: 14px;
}

.seo-more a {
  color: var(--accent-blue);
  text-decoration: none;
}

/* HTML 站点地图列表：便于爬虫与人工核验全部 URL */
.seo-sitemap-list {
  margin: 0;
  padding-left: 1.25rem;
  line-height: 1.7;
}

.seo-sitemap-list li + li {
  margin-top: 8px;
}

.seo-sitemap-list a {
  color: var(--accent-blue);
  text-decoration: none;
  font-weight: 600;
}

.seo-sitemap-list a:hover {
  text-decoration: underline;
}

.seo-sitemap-list span {
  color: var(--text-secondary);
  font-size: 14px;
}

/* 首页 Use Cases 预览区块 */
.use-cases-preview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 14px;
  margin-top: 28px;
}

.use-case-preview-card {
  display: block;
  padding: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: inherit;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.use-case-preview-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.use-case-preview-card strong {
  display: block;
  font-family: var(--font-serif);
  font-size: 18px;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.use-case-preview-card span {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.5;
}

.use-cases-preview-actions {
  margin-top: 28px;
  text-align: center;
}

@media (max-width: 720px) {
  .seo-page {
    padding-top: 100px;
  }

  .seo-card,
  .seo-cta-card {
    padding: 22px 18px;
  }
}